Pump.



M. LAUX.

PUMP.

APPLICATION FILED sEPT.14,19oa.

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UNITED sTATEs PATENT oEEieE.

MATHIAS LAUX, OF LITTLE ROCK, ARKANSAS, ASSIGNOR TO TI-IE DOMESTIC GAS MANUFAC- TURING COMPANY, OF LITTLE ROCK, ARKANSAS, A CORPORATION OF ARKANSAS.

PUMP.

To all 'whom it may concern:

Be it known that I, MATHrAs LAUX, a citizen of the United States, residing at Little Rock, in the county of Pulaski and State of Arkansas, have invented certain Improvements in Pumps, of which the following is a specification.

This invention is an improvement in pumps, and the primary object is to provide a combined force and lift pump which is especially adapted for use in connection with apparatus for carbureting air to feed the gasolene or liquid hydro-carbon from the supply tank into the carbureter, though as will be obvious hereinafter the pump may be used. for pumping liquid for other purposes.

The invention contemplates the provision of a pump in which the parts thereof may be readily and conveniently arranged for lifting and discharging liquid stored in a tank located below the pump, for instance buried outside of a building, or for forcing liquid from a supply elevated above the pump, as the ease may be.

The present application is a division of my prior application for patent led February 1), 1908, Serial No. 416,658, and consists in the particular construction and combination of parts of the improved pump, all as hereinafter fully described and specifically set forth in the appended claims.

In the accompanying drawings, which form a part of this speciiications-Figure 1 is a sectional view of a pump constructed in accordanee with my invention, and showing the parts arranged as a force pump. Fig. 2 is a similar view, with the parts arranged as a lift pump. Fig. 3 is a detail sectional view, enlarged, to more clearly show the construction of the piston and valve located therein. Fig. 4 is a transverse sectional view on the line 4 4 of Fig. 3.

Like numerals of reference indicate like parts in all the figures of the drawings.

In carrying out my present invention I employ in the iirst instance a cylinder or pumpbarrel 5, the lower end of which is formed with opposite branches 6 and 7, the branch 6 being preferably turned upward at its outer end and threadedto receive aoouplingorpipe, while the branch 7 is straight and alsothreaded to receive either a coupling, as 8, (Fig. 2), or a cap, as 9, (Fig. 1), the latter serving to Specification of Letters Patent.

Original application filed February 19, 1908, Serial No. 416,658.

Serial No. 452,948.

Patented July 6, 1909.

Divided and this application filed September 14,

close said branch when the pump is to be used as a force pump. In each instance, however, the branch (i constitutes the discharge opening of the pump. The lower end of the cylinder or barrel is also formed with a depending socket 10, threaded, as shown, for connecting the pump to a suitable base, While the upper end of said cylinder or barrel is enlarged, as at 11, and internally threaded to receive a coupling hereinafter described.

Working in the body of the cylinder or barrel 5 is a piston 12 having the usual packing rings 13, and provided with a central opening 14 enlarged at its upper and lower ends, as at 15 and 16, respectively, the enlarged opening at the lower end being threaded to receive a removable plug 17. Extending transverse across the upper enlarged opening 15 in the piston is a pin 18, the ends of which engage in openings 19 19 in the opposite walls of the piston, and this pin forms the means of attachment of the piston-rod 20 to the piston. It will be here noted that as the openings 19 extend entirely through the piston transversely the connecting pm 1S may be inserted from either side before the piston is inserted in the cylinder; and, also, that said. pin has only a loose engagement and is lheld in place by the walls of the cylinder,

The lower end of the central opening 14 of the piston where it enters the enlarged open ing 16 is ground to provide a seat 21, fora puppet-valve 22, the latter having a stem, 1n the form of a cross in cross-section, which works in the opening 14, and the opening movement of this valve is limited by means of a pin 23 extending transverse across the enlarged opening 16 and engaging in openings 24 in opposite sides of the piston. W hen this puppet-valve is not in use 1t 1s held up against its seat by means of the plug 17, which is threaded in the opening 16, as shown in Fig. 2, and in this instance the pin is removed from the openings 24 and placed in the slots 24, so that the plug 17 will. hold the valve. firmly closed.

Threai'led in the enlarged portion 11 at the upper end of the cylinder or pumpdearrel 1s a coupling 25, through which the piston-rod 2O passes, and the upper end. of this coupling 1s formed to provide an ordinary stufling box 26. Below the stuffing-box, and at one side of the coupling, is a branch-pipe 27, threaded at its outer end to receive a pipe-coupling 28, for connecting a liquid supply pipe 29 to said branch-pipe. The outlet or dischargepipe 6 is provided with an ordinary form of check-valve, as 30, to prevent a backward iiow of water to the pump on the upstroke of the piston.

It will be seen that the several parts of the pump may be readily separated for examination and rep air, and more especially for the purpose of changing its action from a forcepumfp to a lift-pump, and vice versa.

VN hen the pump is to be used as a forcepump the p arts are arranged as shown in Fig. l of the drawings; that is to say, the plug 17 is removed so as to permit of the normal operation of the puppet-valve 22, the inlet pipe 7 at the lower end of the cylinder or barrel is closed by the cap 9, and the supply pipe connected to the branch 27 of the coupling device 25 at the upper end of said cylinder or barrel. In this arrangement, and on the upstroke of the piston the liquid gravitates through the supply pipe 29 into the cylinder, passes through the piston by the puppetvalve to the lower end of the cylinder below said piston, and on the downstroke of the latter the puppet-valve closes so that the piston will force the water from the lower part of the cylinder or barrel out through the discharge pipe 6 and check-valve 30; this operation being repeated on each stroke of the piston.

W'hen the pump is to be used as a lift pump the parts are arranged as shown in Fig. 2 of the drawings, the plug 17 being in.- serted in the lower end of the piston to form a Solid piston, and the supply-pipe being connected to the inlet pipe 7 at the lower end of the cylinder, after removing the cap 9, and in this instance the coupling 25 acts merely as a vent for that part of the cylinder or pumpbarrel above the piston. TWith this arrangement of the parts the upstroke of the piston will draw or lift the water into the lower part of the cylinder through the inlet 7 and will force it out through the discharge pipe and check-valve, the piston in this instance acting the same as an ordinary solid piston and a vacuum or air pressure above the piston being prevented by the opening or vent in the coupling 25.

From the foregoing it will be readily seen that I provide a very simple and effective pump mechanism in which the parts may be readily and conveniently arranged to suit different conditions, and therefore especially useful in connection with a carbureting app aratus where it is desired to pump the gasolene or hydro-carbon from a supply tank isolated from the earbureter.

Having described my invention, what I claim as new and desire to secure by Letters- Patent, is

l. In a pump for the purposes set forth, the combination, of a cylinder or barrel having opposite branches at its lower end and an inlet opening at its upper end, a removable cap adapted to close one of the branches at the lower end of the cylinder or barrel, and a cheek-valve for the other of said branches; together with a piston working in the cylinder or barrel, a valve in said piston, and means for holding the valve in closed position, substantially as herein shown and described.

2. In a pump for the purposes set forth, the combination, of a cylinder or barrel having opposite branches at its lower end and an opening at its upper end, a removable cap adapted to close one of the branches at the lower end of the cylinder or barrel, and a check-valve for the other of said branches; a piston working in the cylinder or barrel and having an opening therethrough enlarged at its ends and transverse openings at opposite sides of the aforesaid enlarged openings, pins loosely engaging the transverse openings and extending across the enlarged openings, one of said pins forming the means of connection for the piston-rod, a puppet-valve in the central opening adapted to engage the other pin, and a plug adapted to hold the puppet-valve in closed position, substantially as shown and described.

3. In a pump for the purposes set forth, the combination, of a cylinder or barrel having opposite branches at its lower end and an opening at its upper end, a removable cap adapted te close one of the branches at the lower end of the cylinder or barrel and a cheek-valve for the other of said branches a piston working in the cylinder or barrel having a central vertical opening therethrough enlarged at its lower end and transverse slots through said piston at opposite sides of the enlarged opening, said central opening having a valve-seat at its lower end, a puppetvalve engaging the seat and having a stem projecting into the central opening, a pin extending across the enlarged opening below the valve and engaging at its ends in the aforesaid slots; and a plug threaded in the lower end of the enlarged opening in the piston and adapted to press the pin against the valve to hold the latter closed, as herein shown and described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MATHIAS LAUX.

IVitnesses: PARK HEATON, )4 JAMES A. GRAY. 

